Taragolis commented on code in PR #26162:
URL: https://github.com/apache/airflow/pull/26162#discussion_r963213113


##########
airflow/providers/docker/hooks/docker.py:
##########
@@ -66,46 +81,51 @@ def __init__(
 
         if not docker_conn_id:
             raise AirflowException('No Docker connection id provided')
-
-        conn = self.get_connection(docker_conn_id)
-
-        if not conn.host:
-            raise AirflowException('No Docker URL provided')
-        if not conn.login:
-            raise AirflowException('No username provided')
-        extra_options = conn.extra_dejson
-
+        self.docker_conn_id = docker_conn_id
         self.__base_url = base_url
         self.__version = version
         self.__tls = tls
         self.__timeout = timeout
-        if conn.port:
-            self.__registry = f"{conn.host}:{conn.port}"
-        else:
-            self.__registry = conn.host
-        self.__username = conn.login
-        self.__password = conn.password
-        self.__email = extra_options.get('email')
-        self.__reauth = extra_options.get('reauth') != 'no'
 
-    def get_conn(self) -> APIClient:
+    @cached_property
+    def api_client(self) -> APIClient:
+        """Create connection to docker host and login to the docker 
registries. (cached)"""
+        conn = self.get_connection(self.docker_conn_id)
         client = APIClient(
             base_url=self.__base_url, version=self.__version, tls=self.__tls, 
timeout=self.__timeout
         )
-        self.__login(client)
+
+        credential_helper = conn.extra_dejson.get("credential_helper")
+        if not credential_helper:
+            # If not specified credential helper than retrieve information 
from Connection.
+            credential_helper = AirflowConnectionDockerCredentialHelper
+            credential_helper_kwargs = {}
+        else:
+            credential_helper = import_string(credential_helper)

Review Comment:
   As far as I know also Secrets Backends, REST API auth_backends and Amazon 
Session Factory also load by `import_string` method without any validation.



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